Adam was foreshadowed as a Defender in the episode The Town that Time Forgot because the Defender sanctuary didn't reject him, as one was shown doing when Seth's 'sigil signature' had been altered by merging with Kragus. This would mean that Adam's own signature had to have been registered as being permitted.
You might think it odd that the master would lie about the fact that a guardian died, but he didn’t lie. The kids were talking to a shapeshifter that stole Raald’s stone and then killed him.
